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    <title>Document</title>
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        .one {
            width: 200px;
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        .two {
            width: 300px;
            height: 300px;
            background-color: blue;
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<body>
    <h1>您好，欢迎来到传智播客</h1>
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    </div>
    <div class="one">

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    <div class="two">

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    <script>
        for (let i = 0; i < 10; i++) {
            console.log(i)
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